Horizon Odyssey 800 Pocket Memory Mattress
Mattress
Horizon Odyssey 800 Pocket Memory Mattress
Size
Firmness
Medium Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Depth (cm)
23
Layers
2
Layer Details
- Memory Foam. A 2cm memory layer that contours to your body for personalised comfort and helps relieve pressure on joints, back and hips. It's a cooling layer too, which matters if you tend to sleep warm.
- Pocket Springs. 800 individual pocket springs that move independently, which means support tailored to where your body needs it and no motion transfer. In practice, you're less likely to feel a partner turning over.
Layer details from mattressonline.co.uk product page, September 2026.
- 90cm each, every night: Two sleepers each get 90cm of width, so you can stretch out without negotiating for the middle ground.
- Distance beats any comfort layer: If your partner turns constantly, the extra width does more for your sleep than foam ever could, and the pocket springs stop movement travelling across.
- Room for wanderers: When a child pads in at 3am, or the dog treats the bed as home, 180cm of width means everyone still gets a fair share.
- Same length as a UK king: At 200cm long, taller sleepers get the same legroom as the UK king, with 30cm of extra width on top.
- Manageable weight at scale: The 23cm depth and slim 2cm memory layer keep this super king lighter to rotate than deeper hybrids of the same footprint.
This size suits you if...
You share the bed most nights and want the most space a mainstream UK size offers, your partner is restless and you'd rather sleep through it than feel it, or children and pets regularly join you and the bed needs to absorb the extra bodies. Your bedroom should comfortably clear 3m x 2.9m, ideally closer to 3.5m x 3.2m.
Consider another size if...
Your room can't comfortably give up 3m x 2.9m of floor space, or you sleep alone. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs a smaller room, at least 2.7m x 2.9m.
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What room size do I need for the Horizon Odyssey 800 super king?
We suggest at least 3m x 2.9m, and around 3.5m x 3.2m feels right if you want bedside tables on both sides and space to walk around the bed. This is our guidance rather than Horizon's. Measure the door swing and any awkward landing turns too, as a 180 x 200cm mattress is a bulky thing to manoeuvre upstairs.
Is the Horizon Odyssey 800 super king good for restless couples?
It's the strongest case for this size. Each sleeper gets 90cm of width, so a partner who turns all night is simply further away, and the 800 pocket springs move independently, so what movement remains doesn't travel across the mattress. If disturbance is your main complaint, the extra width helps more than any upgrade in comfort layers would.
How big is the Horizon Odyssey 800 in a super king?
It measures 180 x 200cm, or 6ft x 6ft 6in. That's 30cm wider than the UK king and the same 200cm length, so you gain width without losing legroom. It's the largest size this mattress comes in, and the largest size UK retailers stock as standard.
Can a family share this size when children climb in?
This is where a super king makes sense. At 180cm wide, a small visitor in the small hours doesn't push either adult to the edge, and the independent pocket springs mean their wriggling is less likely to wake whoever is still asleep. The medium firm feel also holds its shape reasonably well with an extra body aboard.
What bedding does the Horizon Odyssey 800 super king take?
You'll need super king sheets to fit the 180 x 200cm surface, and we'd suggest a 260 x 220cm duvet so the covers drape properly on both sides. Bedding at this size costs more than king equivalents, which is a running cost to factor in, although it's a one-off step up rather than an ongoing premium.